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Finding the Fourth Proportional to 659.50, 989.23 and 269.39

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Solution

The fourth proportional to 659.50, 989.23 and 269.39 is: 404.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.50 : 989.23 = 269.39 : x
  2. Step 2: Convert to fraction form
    659.50/989.23 = 269.39/x
  3. Step 3: Cross multiply
    659.50x = 989.23 × 269.39
  4. Step 4: Simplify right side
    659.50x = 266,486.52
  5. Step 5: Solve for x
    x = 266,486.52/659.50
  6. Step 6: Final answer
    x = 404.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.